Which is heavier 1 kg or 1100 g?

Answer 1

1100 g. 1 kg = 1000 g. However, weight is not dependent on mass but rather the force exerted upon the mass. For example, 1 kg would be heavier on Jupiter than 1100 g on Earth. But I assume you only want the Earth pertinent answer, in which case 1100 g is heavier.